Machine-treadle



(No Model.)

A. T. TREGURTHA, MACHINE TREADLB.

Patented Dec. 31, 1889.

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UNITED STATES PATENT OFFICE.

ALFRED T. TREGURTl-IA, OF EVERETT, ASSIGNOR TO HENRY A. CLARK, OFBOSTON, MASSACHUSETTS.

MACHlNE-TREADLE.

SPECIFICATION forming part of Letters Patent No. 418,661, dated December31, 1889.

7 Application filed February 18,1889. Serial No. 300,5l6- (N model.

To all whom it may concern.-

Be it known that I, ALFRED T. TREGURTHA, of Everett, in the county ofMiddleseX and State of Massachusetts, have invented certain new anduseful Improvements in Machine- Treadles, of which the following is afull, clear, and exact description.

This invention consists of a treadle pivoted to anysuitable support foroperation thereof,

ro and having a foot-piece pivoted thereto and In the drawings, Arepresents a treadle,

pivoted at B to the supportO and adapted by its end D to be connected toany desired ma- 2 5 chine-for instance, a pressbut not needing to bedescribed or shown in this application.

The treadle has a foot piece or pad E, pivoted at F, so as to swingvertically thereon within certain limits, having a stud or projection G,

0 and a spring H, adapted to bear against its under side and secured tothe treadle at a.

J is a standard secured to the support 0 and having on its outer edge aseries of notches b, with which notches the stud of the foot- 3 5 pieceon the treadle is arranged to engage when the lever is swung down, (seeFigs. 1

and 2,) the standard being secured in such position in relation to thetreadle-pivot that when moved down into the position shown in 0 Fig. 1its stud will engage with any one of the notches desired. With thetreadle moved down and its stud engaged with a notch, the

foot-piece is held by the resistance of the machine or othermechanisinconnected to the treadle to such engagement, and thus the treadle isheld in such position, being looked,

as it were. The stud of the foot-piece is in such relative position tothe pivot of the footpiece that when the treadle is so locked thegreater the resistance of the machine to the treadle the more positiveand firmer is it held in such posit-ion, preventing accidentaldetachment.

To release the treadle, press it down slightly and swing the foot-piecedown at its front edge d, which releases its stud from its engagementwith the notch, and being held in such position it is free to pass bythe notches, so that then the treadle can rise into the position shownin dotted lines in Fig. 1. By this attachment to a treadle it can beeasily and conveniently-locked in the position desired and as easilyunlocked.

If desired, the'spring can be dispensed with,

although it is preferable to use it.

In lieu of having the projection or stud G on the foot-piece, it canengage by its rear edge with the notched bar; but it is preferable tohave a projection.

Having thus described myinvention, what a I claim i's 1. Amachine-treadle having a foot-piece pivoted thereto and provided on oneend with a projection or stud adapted to engage by the swinging of thefoot-piece with a notched bar or standard, for the purpose specified.

2. A machine-treadle having a foot-piece pivoted thereto and providedwith a projection or stud adapted to engage witha notched bar orstandard, and a spring bearing against

